Method of operating a gas-turbine group by directing a fuel/water mixture to the combustion chamber

Abstract

In a method of operating a gas-turbine group, an exhaust-gas flow ( 9 ) of the gas-turbine group is admitted to a heat-exchange stage ( 14, 18 ), through which a liquid fuel ( 12 ) and a water quantity ( 16 ) flow. The thermally processed media ( 12, 16 ) are then brought together, whereby an emulsion ( 19 ) is formed, and this emulsion ( 19 ) is used to operate a burner of a combustion chamber. In this way, the spraying of this very hot emulsion ( 19 ) into the combustion air ensures good mixing.

What is claimed as new and desired to be secured by Letters Patent of the United States is:  
     
       1. A method of operating a gas-turbine group, comprising the steps of: 
       providing a compressor unit, at least one combustion chamber, at least one turbine and a generator;  
       operating said at least one combustion chamber with the aid of a burner composed of a combustion-air-swirled premix section;  
       admitting a gas flow from the gas-turbine group to a heat-exchange stage, wherein a liquid fuel and a water quantity flow through this heat-exchange stage and are subjected to thermal processing there;  
       forming an emulsion with the hot liquid fuel and the hot water; and  
       operating the burner of the combustion chamber with the emulsion.  
     
     
       2. The method as claimed in claim  1 , wherein the gas-turbine group is operated according to sequential firing. 
     
     
       3. The method as claimed in claim  1 , wherein exhaust gases of the turbine are admitted to the heat-exchange stages. 
     
     
       4. The method as claimed in claim  1 , wherein an air flow from the compressor sage is admitted to the heat-exchange stages. 
     
     
       5. A method of operating a gas-turbine group, comprising the steps of: 
       providing a compressor unit, at least one combustion chamber, at lest one turbine and a generator;  
       operating said at least one combustion chamber with the aid of a burner composed of a combustion-air-swirled premix section;  
       admitting a gas flow from the gas-turbine group to a heat-exchange stage, wherein a liquid fuel and a water quantity flow through this heat-exchange stage and are subjected to thermal processing there;  
       directing the hot fuel into superheated steam generated from the water; and  
       operating the burner of the combustion chamber with this fuel/steam mixture.  
     
     
       6. The method as claimed in claim  5 , wherein the fuel/steam mixture is directed as low-calorific fuel into the burner of the combustion chamber.